# -*- coding: utf-8 -*-
import enum
from typing import List, TypeVar

OrderLine = TypeVar("OrderLine")
DepthLevel = List[OrderLine]
OrderBook = List[DepthLevel]


class Side:
    SELL = 0
    BUY = 1

# value跟xt future 保持一致
class Action(enum.Enum):
    long = 'BUY'
    short = 'SELL'
